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See detailUnmanned aerial survey of elephants
Vermeulen, Cédric ULg; Lejeune, Philippe ULg; Lisein, Jonathan ULg et al

in PLoS ONE (2013), 8(2),

The use of a UAS (Unmanned Aircraft System) was tested to survey large mammals in the Nazinga Game Ranch in the south of Burkina Faso. The Gatewing ×100™ equipped with a Ricoh GR III camera was used to ... [more ▼]

The use of a UAS (Unmanned Aircraft System) was tested to survey large mammals in the Nazinga Game Ranch in the south of Burkina Faso. The Gatewing ×100™ equipped with a Ricoh GR III camera was used to test animal reaction as the UAS passed, and visibility on the images. No reaction was recorded as the UAS passed at a height of 100 m. Observations, made on a set of more than 7000 images, revealed that only elephants (Loxodonta africana) were easily visible while medium and small sized mammals were not. The easy observation of elephants allows experts to enumerate them on images acquired at a height of 100 m. We, therefore, implemented an aerial strip sample count along transects used for the annual wildlife foot count. A total of 34 elephants were recorded on 4 transects, each overflown twice. The elephant density was estimated at 2.47 elephants/km2 with a coefficient of variation (CV%) of 36.10%. The main drawback of our UAS was its low autonomy (45 min). Increased endurance of small UAS is required to replace manned aircraft survey of large areas (about 1000 km of transect per day vs 40 km for our UAS). The monitoring strategy should be adapted according to the sampling plan. Also, the UAS is as expensive as a second-hand light aircraft. However the logistic and flight implementation are easier, the running costs are lower and its use is safer. Technological evolution will make civil UAS more efficient, allowing them to compete with light aircraft for aerial wildlife surveys. [less ▲]

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See detailRéseau Qualité des Laboratoires de l'ULg - Rapport d'activité Février 2013
Dumont, Fabien ULg; Hubert, Philippe; Beauvois, Véronique et al

Diverse speeche and writing (2013)

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See detailLe parfum dans les iconographies religieuses et publicitaires
Dondero, Maria Giulia ULg

in Dondero, Maria Giulia (Ed.) Le parfum et l'amour (2013)

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See detailL'ingénierie patrimoniale dans les relations franco-belges : perspectives de droit international privé belge
Wautelet, Patrick ULg

in Dereme, François (Ed.) Ingénierie patrimonial. Questions particulières dans un contexte franco-belge (2013)

Cette contribution s'attache aux questions de droit international privé qui peuvent intéresser la pratique des relations patrimoniales franco-belges. Elle présente succinctement les lignes de force de la ... [more ▼]

Cette contribution s'attache aux questions de droit international privé qui peuvent intéresser la pratique des relations patrimoniales franco-belges. Elle présente succinctement les lignes de force de la réglementation de droit international privé dans les principales branches susceptibles d'intéresser le praticien. L'optique étant celle de la planification successorale, la contribution met l'accent sur l'espace de liberté dont disposent les parties. Plus précisément, la question qui fera figure de fil rouge est celle de savoir quelle marge de manœuvre le droit international privé accorde aux parties qui envisagent l'une ou l'autre opération patrimoniale. Cette question est abordée à propos de trois grands moments de la vie : le mariage et les relations qui y sont assimilées, le décès et les libéralités à cause de vif. [less ▲]

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See detailMode visibilities in rapidly rotating stars
Reese, Daniel ULg; Prat, V.; Barban, C. et al

in Astronomy and Astrophysics (2013), 550

Context: Mode identification is a crucial step to comparing observed frequencies with theoretical ones, but has proven to be difficult in rapidly rotating stars. Aims: To further constrain mode ... [more ▼]

Context: Mode identification is a crucial step to comparing observed frequencies with theoretical ones, but has proven to be difficult in rapidly rotating stars. Aims: To further constrain mode identification, we aim to accurately calculate mode visibilities and amplitude ratios in rapid rotators. Methods: We derive the relevant equations for calculating mode visibilities in different photometric bands while fully taking into account the geometric distortion from both the centrifugal deformation and the pulsation modes, the variations in effective gravity, and an approximate treatment of the temperature variations. These equations are then applied to 2D oscillation modes, calculated using the TOP code, in fully distorted 2D models based on the SCF method. The specific intensities come from a grid of Kurucz atmospheres, thereby taking into account limb and gravity darkening. Results: We obtain mode visibilities and amplitude ratios for 2 M_{\odot} models rotating at 0 to 80 % of the critical rotation rate. These calculations confirm previous results, such as the increased visibility of chaotic modes, the simpler frequency spectra of pole-on stars, or the dependence of amplitude ratios on inclination and azimuthal order. In addition, the geometric shape of the star reduces the contrast between pole-on and equator-on visibilities of island modes. We also show that modes with similar (ell, |m|) values frequently have similar amplitude ratios, even in the most rapidly rotating models. [less ▲]

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See detailLes réticences à la vaccination : approche du phénomène à travers les données de la littérature
Ketterer, Frédéric ULg; Trefois, Patrick; Miermans, Marie-Christine ULg et al

in Revue Médicale de Liège (2013), 68(2), 74-78

Although it exists since vaccination appeared, reticence towards vaccination seems to be increasing. Through a literature review, this article first analyses the reasons for this reticence. The decline of ... [more ▼]

Although it exists since vaccination appeared, reticence towards vaccination seems to be increasing. Through a literature review, this article first analyses the reasons for this reticence. The decline of infectious diseases leads to greater attention to side effects of vaccines; on the other hand, the social evolution leads patients to search for zero risk in different aspects of life. Suspiciousness towards the State and the influence of media emphasizing potential deleterious effects of each vaccine are additional phenomena explaining people’s hesitations. Anti-vaccination movements using Internet to disseminate their ideas are also responsible. Secondly, the article aims at assessing the public opinion about vaccination. It is still predominantly positive, even if questions remain. A typology of four patients’ profiles based on statistical results is proposed. Finally, after having examined the medical doctors’ opinion concerning vaccination, this article ends with some pieces of advice on how to deal with vaccination in the patientdoctor relationship. [less ▲]

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See detailDevelopment of a test to assess the Banana Bunchy Top Virus transmissibility through direct analysis of its aphid vector Pentalonia nigronervosa
De Clerck, Caroline ULg; Francis, Frédéric ULg; Lepoivre, Philippe ULg et al

in Communications in Agricultural and Applied Biological Sciences (2013, February), 78(1), 49-54

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See detailLa construction européenne, entre idées reçues et faux semblants (3ème édition)
Michel, Quentin ULg; Stans, David ULg; Habran, Maxime ULg et al

Book published by Presses Universitaires de Liège (2013)

Detailed reference viewed: 23 (5 ULg)
See detailRêvHaïti
Brathwaite, Kamau; Pagnoulle, Christine ULg

Book published by Mémoire d'encrier (2013)

This long poem is a multilayered scream against dispossession.

Detailed reference viewed: 19 (3 ULg)
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See detailNaar een ethisch verantwoorde nanotechnologie? Over de plaats van ethiek in het huidige wetenschapsbeleid
Laurent, Brice; Van Oudheusden, Michiel ULg

in Ethiek & Maatschappij (2013), 14(4),

In this article, the authors describe how transhumanist ideas influence science nanotechnology policy in the United States. Subsequently, they distinguish different ways in which policymakers and ... [more ▼]

In this article, the authors describe how transhumanist ideas influence science nanotechnology policy in the United States. Subsequently, they distinguish different ways in which policymakers and scientists, both in the US and in Europe, address social and ethical implications of nanotechnology research and development. They discern two dominant approaches to responsible technology development: a rationalist approach, which separates scientific issues from ethical questions, and a procedural approach, which adheres to guiding moral principles for responsible technology development. They add to this classification an experimental approach, which directly intervenes in scientific practice. By indicating how concerned actors ethicize nanotechnology in different ways, the authors seek to clarify what is meant by ethics in nanotechnology development and incite reflection on the interconnectedness of ethics and new technologies. [less ▲]

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See detailPerformance evaluation of methods for correcting ocular artifacts in electroencephalographic (EEG) recordings
Kirkove, Murielle ULg; François, Clémentine; Libotte, Aurélie et al

Scientific conference (2013, February)

The presence of ocular artifacts (OA) due to eye movements and eye blinks is a major problem for the analysis of electroencephalographic (EEG) recordings in most applications. A large variety of methods ... [more ▼]

The presence of ocular artifacts (OA) due to eye movements and eye blinks is a major problem for the analysis of electroencephalographic (EEG) recordings in most applications. A large variety of methods (algorithms) exist for detecting or/and correcting OA’s. We identified the most promising methods, implemented them, and compared their performance for correctly detecting the presence of OA’s. These methods are based on signal processing “tools” that can be classified into three categories: wavelet transform, adaptive filtering, and blind source separation. We evaluated the methods using EEG signals recorded from three healthy persons subjected to a driving task in a driving simulator. We performed a thorough comparison of the methods in terms of the usual performances measures (sensitivity, specificity, and ROC curves), using our own manual scoring of the recordings as ground truth. Our results show that methods based on adaptive filtering such as LMS and RLS appear to be the best to successfully identify OA’s in EEG recordings. [less ▲]

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See detailDevelopment of an experimental device allowing plant-plant interaction studies and in situ dynamic trapping of volatile organic compounds emitted by barley (Hordeum distichon L.) roots
Delory, Benjamin ULg; Delaplace, Pierre ULg; Fauconnier, Marie-Laure ULg et al

in Communications in Agricultural and Applied Biological Sciences (2013, February), 78(1), 97-102

In response to wounding or herbivore attack, leaves and roots of higher plants release volatile organic compounds (VOCs). To date, VOCs analysis and plant−plant interaction studies have been mainly ... [more ▼]

In response to wounding or herbivore attack, leaves and roots of higher plants release volatile organic compounds (VOCs). To date, VOCs analysis and plant−plant interaction studies have been mainly performed on aboveground plant tissues, leaving the roles played by root VOCs in plant−plant interaction unexplored. In this context, this project aims at setting up an original experimental device allowing both dynamic trapping of VOCs emitted by mechanically damaged H. distichon roots and the study of the roles played by root VOCs in intra and interspecific plant−plant interactions. The experimental device consists of Barley seedlings cultivated in closed PTFE reactors filled with wet sand. Before being analysed by gas chromatography−mass spectrometry, root VOCs are trapped via a dynamic system on Tenax cartridges using a charcoal-filtered and humidified air. Preliminary results show that 7 day-old wounded Barley roots emit C9 fatty acid derivatives (E-non-2-enal and nona-2,6-dienal) as major compounds, contrasting with aboveground plant tissues that mainly emit C6 alcohols, aldehydes, and their derivative esters. For plant−plant interaction studies, receiver plants are exposed to an airflow enriched with VOCs from root damaged Barley plants of the same age. [less ▲]

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See detailExperimental investigation of passive/active oxidation behavior of SiC based ceramic thermal protection materials exposed to high enthalpy plasma
Sakraker, Isil ULg; Asma, Cem Ozan

in Journal of the European Ceramic Society (2013), 33(2), 351-359

The passive/active oxidation behavior of a CVD-SiC coated C/C-SiC thermal protection material of the hypersonic SpaceLiner vehicle is investigated experimentally. For the safety of spacecraft and its ... [more ▼]

The passive/active oxidation behavior of a CVD-SiC coated C/C-SiC thermal protection material of the hypersonic SpaceLiner vehicle is investigated experimentally. For the safety of spacecraft and its passengers, it is important to know whether the thermal protection system will experience passive/active oxidation during the vehicle’s entry into Earth’s atmosphere. Active oxidation can promote material loss whereas passive oxidation forms a protective film. The high enthalpy flight conditions of SpaceLiner vehicle are duplicated in VKI Plasmatron, where the samples are exposed to high enthalpy plasma and the surface temperatures increase up to 2800 K at various total pressure (2–20 kPa) conditions. Surface temperature profiles, visual characteristics, mass changes, emissivity, spectrometer and SEM/EDX data are examined to identify the oxidation transition border of the tested material. A temperature jump is observed in all active oxidation regimes. The experimental results are found to be in good agreement with correlations from the literature. [less ▲]

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See detailLes cultes isiaques dans la péninsule Ibérique. Contribution à l'étude du phénomène isiaque dans l'Occident méditerranéen
Puccio, Laetizia ULg

Doctoral thesis (2013)

En 1967, dans son ouvrage plus largement consacré aux religions orientales dans l'Espagne romaine, Antonio García y Bellido offrait une synthèse des cultes isiaques dans la péninsule Ibérique. Après lui ... [more ▼]

En 1967, dans son ouvrage plus largement consacré aux religions orientales dans l'Espagne romaine, Antonio García y Bellido offrait une synthèse des cultes isiaques dans la péninsule Ibérique. Après lui, quelques savants ont tenté d'actualiser son catalogue, d'autres ont posé à la documentation de nouvelles questions. Depuis les années quatre-vingt-dix, Jaime Alvar a écrit une série d'articles sur le sujet, sans jamais les coordonner dans un seul et même volume. Après plusieurs mois de recherches, grâce au matériel déjà connu, il apparaît que l'absence d'une histoire des cultes isiaques dans la péninsule Ibérique peut et mérite d'être comblée. Le développement des études isiaques permet aux chercheurs de poser à la documentation de nouvelles questions, d'autant que les découvertes d'isiaca, aussi ponctuelles soient elles, ont étoffé peu à peu le catalogue des sources. L'apparition de ces documents présume une nouvelle interprétation du phénomène isiaque dans la péninsule Ibérique. A première vue, on sera conduit à enregistrer une évolution, mais il semble qu'elle sera d'abord d'ordre quantitatif. Elle confirmera surtout l'importance de l'étendue des cultes isiaques dans la Péninsule, le principal obstacle restant l'absence de nouvelles données transmises par ces documents. Néanmoins, ces découvertes, considérées dans une perspective plus large, contribueront à améliorer notre vision du phénomène religieux dans un espace géographique dont les spécificités ne manquent pas et actualiseront une recherche en sommeil depuis quarante ans. [less ▲]

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See detailCharacterization of three new carboxylic ester hydrolases isolated by functional screening of a forest-soil metagenomic library
Biver, Sophie ULg; Vandenbol, Micheline ULg

in Journal of Industrial Microbiology & Biotechnology (2013), 40(2), 191-200

Detailed reference viewed: 29 (11 ULg)
See detailSleep in Patients with Disorders of Consciousness
Cologan, Victor ULg

Book published by Lambert Academic Publishing (2013)

Sleep is a complex and essential activity for the preservation of the brain and for the general health of an individual. The nature of sleep is therefore of major importance for brain injured patients ... [more ▼]

Sleep is a complex and essential activity for the preservation of the brain and for the general health of an individual. The nature of sleep is therefore of major importance for brain injured patients with disorders of consciousness. However the standard definition of sleep is not relevant for this clinical population and it is thus necessary to adapt the standard method of sleep analysis. In this book we review the specialized literature and present our own original study of sleep in the unresponsive wakefulness syndrome and minimally conscious state. We describe the wide variety of sleep patterns possible in these patients who often no longer retain their sleep-wake cycle. In particular we shed light on the fact that standard sleep stages can differentiate the minimally conscious state from the unresponsive wakefulness syndrome and that they predict possible behavioral improvements within a period of 6 months. This new and promising field of research should be especially useful to neurologists and researchers who wish to improve the clinical evaluation and the care of their patients as well as improving the understanding of the neural correlations of vigilance and consciousness. [less ▲]

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See detailLa politique étrangère d'Obama: changement dans la continuité
Santander, Sébastian ULg

in Revue Nouvelle (2013), 12

Le présent article propose une réflexion autour de la politique étrangère menée par la première administration Obama. La question qui guide cette recherche est la suivante: la politique étrangère d'Obama ... [more ▼]

Le présent article propose une réflexion autour de la politique étrangère menée par la première administration Obama. La question qui guide cette recherche est la suivante: la politique étrangère d'Obama se distancie t-elle de celle menée sous l'administration Bush? L’hypothèse soutenue est que la politique étrangère d’Obama se distingue par le prolongement voire l’accentuation des politiques antérieures. Afin de vérifier cette hypothèse, l'article revient sur la doctrine Obama (smart power) et la confronte à la réalité en analysant la stratégie de lutte contre le terrorisme, la politique au Proche-Orient (dossier israélo-Palestinien), les rapports avec les puissances émergentes (Russie, Chine-Asie) ainsi qu'avec l'Europe, l'Amérique latine et l'Afrique. [less ▲]

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See detailOptimal discovery with probabilistic expert advice: finite time analysis and macroscopic optimality
Bubeck, Sébastien; Ernst, Damien ULg; Garivier, Aurélien

in Journal of Machine Learning Research (2013), 14

We consider an original problem that arises from the issue of security analysis of a power system and that we name optimal discovery with probabilistic expert advice. We address it with an algorithm based ... [more ▼]

We consider an original problem that arises from the issue of security analysis of a power system and that we name optimal discovery with probabilistic expert advice. We address it with an algorithm based on the optimistic paradigm and on the Good-Turing missing mass estimator. We prove two different regret bounds on the performance of this algorithm under weak assumptions on the probabilistic experts. Under more restrictive hypotheses, we also prove a macroscopic optimality result, comparing the algorithm both with an oracle strategy and with uniform sampling. Finally, we provide numerical experiments illustrating these theoretical findings. [less ▲]

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See detailTherapeutic Strategy and Patient Outcome during the First 2 Years of Pediatric Crohn’s Disease
Veereman, G; Mahachie John, Jestinah ULg; De Greef, E et al

in Acta Gastroenterologica Belgica (2013, February)

Detailed reference viewed: 5 (0 ULg)